Core-forming device for sash-weight casting



Feb. 2, 1 2a. 1,57i ,s94

I J. J. O'BRIEN J conz FoRumq DEVICE FOR SASH WEIGHT CASTING IT-FiledApril 5, 1922 'ATI N AL INVEN 'I'CIR Patented Feb. 2, 1926.

UNITED STATES PATENT OFFICE.

JOSEPI'I J'. OBRIEN, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO WILLIAMM. BARNARD, OF SPRINGFIELD, IIIASSACHUSETTS.

CORE-FORMING DEVICE FOR SASI-I-WEIGI-IT CASTING.

Application filed April 15, 1922.

To all whom it may concern:

Be it known that JOSEPH J. OBRIEN, a citizen of the United States ofAmerica, residing at Springfield, in the county of Hampden and State ofMassachusetts, has invented certain new and useful Improvements inCore-Forming Devices for Sash- Weight Casting, of which the following 1sa specification.

This invention relates to improvements in core boxes for forming coresfor castlng sash weights and its leading object is to provide simplemeans for impressing the weight number on the core capable of rapidinsertion and rapid withdrawal from the core box.

The improved device for impressing the weight number on the core forforming the sash weight eye consists of a single piece device havinginterfitting companion jaws, one of which carries the weight characteror type, the jaws being separable by the spring tension of theconnecting portlon of the device.

\Vith the above and other objects in view the invention consists ofcertain new and useful constructions and arrangements of parts, clearlydescribed in the following specification and clearly illustrated in thefollowing drawings, in which Fig. 1 is a vertical sectional View througha core box.

Fig. 2 is an end View of the device.

Fig. 3 is a plan view thereof.

Referring to the accompanying drawings illustrating the practicalembodiment of the invention 5 designates a core box, which is shown tobe formed in, one piece, and may be constructed of metal, wood, or anysuitable material, and which is provided on its lower end with a taperedstem 6, adapted to fit in a socket or hole 7 formed in a suitable tableor other support. This stem is shown to be provided with a plurality offaces to resist rotative movement in the socket, which is shaped to fitthe stem.

The box 5 is formed with a chamber 5 in which the sand is packed, thelower end of this chamber tapering, and the side walls 8 and 9 of thebox being formed with openings 8 and 9 disposed in registration witheach other.

Serial No. 553,222.

Through the registering openings 8 and 9 of the core box 5 the formingdevice 10 is extended. This device consists of a pair of interfittingjaws, the upper jaw 11 and the lower jaw 12, each of which is formedU-shaped, in cross section. The two jaws are connected to each other bymeans of a spring U-shaped portion or loop 13, so that the upper jawwill be forced upwardly against the edge portions 8 and 9 of the sidewalls 8 and 9. On the upper jaw the weight character or type 14 isformed.

The jaws 11 and 12 are provided with stops 15 and 16 so that theinsertion of the device in the core box will be limited and thecharacter will come to a position in the center of the core box.

After the device is inserted in the core box sand is placed therein andthe tension on the jaws 11 and 12 of the connecting spring is sufficientto prevent the upper aw yielding under the tamping. vlVhen the core boxhas been filled with sand the worker grips the outer end of the deviceand by hand pressure closes the two jaws on each other and thenwithdraws the device, holding the lower jaw against the lower edgeportions of the openings of the side walls 8 and 9, so that thecharacter will be depressed and may be withdrawn by a sliding action ofthe whole device. hen this is gone the core may be taken from the coreThe core is placed in the mould flask in a manner well known to the artin line with the impression formed by the pattern of the body of thesash weight, and the molten iron poured in the flask.

I claim 1. A core forming device for sash weight casting consisting of apair of aws, one jaw being a U shaped construction and the other jawhaving sliding movement therein, the first jaw carrying a castingcharacter thereon, a U shaped spring connecting the jaws to each otherand maintaining the same normal interfitting relation and providing ahandle for the insertion and removal of the jaws from a core box.

2. A one piece core forming device consisting of a member bent uponitself to provide a pair of opposing jaws, each of said jaws beingprovided with longitudinal flanges, the longitudinal flanges of one ofthe jaws having sliding fit within the longitudinal flange of the otheruw, the bend of 5 the device constituting a spring to maintain a slightout urd tension upon the jaws, one of the jaws being provided with acharacter on its outer face to engage the core being formed and capableof being disengaged lilierei'roin by pressure exerted upon said 10 an.

Signed by me at Springfield.

JOSEPH J. OBRIEN.

